1989 gti cab running rough

Hi all
Ive just got my 1989 gti cab out of garage for mot, its been dry stored for 12 mths, ive put new plugs and leads, timing belt on but its running rough, ive got to pick up the revs for it to run smooth, its like a misfire at low revs but it dont back fire and wont tick over.
It was fine when when i garaged it 12mths ago.
All replys are gratefull.
Thanks ChubbsyGTi.

How old is the petrol and how much does it show on the gauge first of all?

If not done so already, get in it and take it for a blast.
Motorway is the best, push it in order to clean of the cräp out of it.
30 to 40 miles should do it, then see how it behaves at low revs.  

Check the dizzy cap it may have a hairline crack in it which can be noticeable at low revs. Clean the rotor arm while you are in there.


Sent from my iPhone using Tapatalk

It is low on fuel, as im changing fuel filler neck.
I will do what u said and take it up the M4.
Thanks for that.

ChubbsyGTi said

It is low on fuel, as im changing fuel filler neck.
I will do what u said and take it up the M4.
Thanks for that.

That could be your problem if you have a rusty/holey filler neck, blocked fuel line or fuel pick up, lift pump in tank dead?

DO THE FILLER NECK NOW, if you don't and water etc gets into the fuel tank then into the injection system it can be costly to fix and will cause allsorts of problems.

As the cars been standing for 12 months stick in some new oil as 12 months or 10000 miles is all it lasts, check coolant is still OK, blue coolant any lasts 2 years before it needs to be changed.

Thanks for that, there could be rust in tank the filler neck was rotten with big holes in it.
Thanks again,
ChubbsyGTi